US2684980A - Use of naphthalene disulfonic acid as a catalyst in the manufacture of isopropenyl acetate - Google Patents
Use of naphthalene disulfonic acid as a catalyst in the manufacture of isopropenyl acetate Download PDFInfo
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- US2684980A US2684980A US290080A US29008052A US2684980A US 2684980 A US2684980 A US 2684980A US 290080 A US290080 A US 290080A US 29008052 A US29008052 A US 29008052A US 2684980 A US2684980 A US 2684980A
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- acetone
- catalyst
- keten
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- naphthalene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0215—Sulfur-containing compounds
- B01J31/0225—Sulfur-containing compounds comprising sulfonic acid groups or the corresponding salts
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/46—Preparation of carboxylic acid esters from ketenes or polyketenes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2231/00—Catalytic reactions performed with catalysts classified in B01J31/00
- B01J2231/30—Addition reactions at carbon centres, i.e. to either C-C or C-X multiple bonds
- B01J2231/32—Addition reactions to C=C or C-C triple bonds
- B01J2231/323—Hydrometalation, e.g. bor-, alumin-, silyl-, zirconation or analoguous reactions like carbometalation, hydrocarbation
Definitions
- Our invention is directed towards the provision of improved catalysts particularly adapted to the manufacture of isopropenyl acetate from keten and acetone, particularly when the keten has been obtained by pyrolysis of acetone and is consequently present in a mixture of gases at atmospheric pressure.
- Our catalysts are superior to the known catalysts giving higher yields than do the known catalysts.
- naphthalene disulphonic acids there are for example naphthalene-1:5-disulphonic acid, naphthalene-2:S-disulphonic acid and naphthalene-2:7-disulphonic acid.
- reaction products of these naphthalenedisulphonic acids which may also be used are of uncertain constitution but it is believed that they are mixed anhydrides. It is believed also, although this hypothesis is advanced only by Way of explanation, that when the naphthalene-disulphonic acid is used as such it is first converted into the said reaction product by reaction with keten.
- Example 1 A gas obtained by pyrolysis of acetone and containing about 30 mols. per cent of keten and substantially free from acetone is bubbled at a rate of 1.5 gram mols. of keten per hour through a solution of 5 grams of naphthalene-1:5-disulphonic acid in 1200 grams of acetone in a reaction vessel in a bath maintained at 75 to- 85 C. Acetone is condensed from the oif-gases at 60 to 70 C. and returned to the reaction vessel. After 14 hours the contents of the reaction vessel are fractionally distilled and 1442 grams of isopropenyl acetate are obtained. This represents a yield of 92.7% calculated on the acetone consumed and of 90.0% calculated on the keten absorbed. The conversion of acetone is 75.2%.
- Example 2 170 grams of naphthalene-1:5-disulphonic acid (containing 20% Water) is boiled under reflux with 320 grams of acetic anhydride during 4 hours in a bath maintained at C. The mixture is then distilled to 40 C. at a pressure of 10 mms. The residue is used as catalyst in the following process in which the details are those of Example 1. Keten is passed at a rate of 1.5 gram mols. per hour through a mixture of 5 grams of the catalyst and 1250 grams of acetone for 13.5 hours. Distillation of the reaction mixture affords 1552 grams of isopropenyl acetate which represents a yield of 93.6% calculated on the acetone consumed and of 91.3% calculated on the keten absorbed. lhe conversion of acetone is 76.9%.
- Example 3 Keten is passed at a rate of 1.5 gram mols. per hour through a mixture of 4 grams of naphthalene-2:6-disulphonic acid and 1300 grams of acetone for 6.5 hours as described in Example 1. Distillation of the reaction mixture affords 664 grams of isopropenyl acetate which represents a yield of 94.2% calculated on the acetone consumed and of 90.7% calculated on the keten absorbed. The conversion of acetone is 31.7%.
- Example 4 grams of naphthalene-2zo-disulphonic acid (water content 20%) and 350 grams of acetic anhydride are boiled together under reflux during 4 hours in a bath maintained at 140 C. The mixture is then distilled to 40 C. at 10 mms. pressure and the residue is used as catalyst in the following process in which the details of operation are those of Example 1. Keten is passed at a rate of 1.5 gram mols. per hour through a mixture of 5 grams of the catalyst and 1300 grams of acetone for 6.5 hours. By distillation of the reaction product, 589 grams of isopropenyl 3 acetate are obtained which represents a yield of 97.1% calculated on the acetone consumed and of 95.2% calculated on the keten absorbed. The conversion of acetone is 27.2%.
- Example 5 Keten is passed at a rate of 1.5 gram mols. per hour through a mixture of 4 grams of naphthalene-2:7-disulphonic acid and 1300 grams of acetone for 5.5 hours as described in Example 1. Distillation of the reaction product afiords 565 grams of isopropenyl acetate which represents a yield of 94.9% calculated on the acetone consumed and of 92.8% calculated on the keten absorbed. The conversion of acetone is 26.4.
- a catalyst comprising the reaction product of a naphthalene disulfonic acid and a compound selected from the group consisting of acetic anhydride and keten.
- a catalyst comprising the reaction product of a naphthalene-1:5-disulfonic acid and a compound selected from the group consisting of acetic anhydride and keten.
- a catalyst comprising the reaction product of a naphthalene-2:G-disulfonic acid and a compound selected from the group consisting of acetic anhydride and keten.
- a catalyst comprising the reaction product of a naphthalene-2:7-disulfonic acid and a compound selected from the group consisting of acetic anhydride and keten.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Patented July 27, 1954 USE OF NAPHTHALENE DISULFONIC ACID AS A CATALYST IN THE MANUFACTURE OF ISOPROPENYL ACETATE Frank Clifford Mawer, Blackley, England, as-
signor to Imperial Chemical Industries Limited, a corporation of Great Britain No Drawing. Application May 26, 1952, Serial No. 290,080
Claims priority, application Great Britain May 29, 1951 This invention concerns improvements in or relating to the manufacture of isopropenyl acetate.
It is known to obtain isopropenyl acetate by condensation of keten with acetone in the presence of acidic catalysts and their acetyl derivatives, for example inthe presence of sulphuric acid, p-toluenesulphonic acid and p-nitrobenzenesulphonic acid.
Our invention is directed towards the provision of improved catalysts particularly adapted to the manufacture of isopropenyl acetate from keten and acetone, particularly when the keten has been obtained by pyrolysis of acetone and is consequently present in a mixture of gases at atmospheric pressure. Our catalysts are superior to the known catalysts giving higher yields than do the known catalysts.
According to the invention we provide a process for the manufacture of isopropenyl acetate by reacting keten with acetone characterised in that there is used as catalyst a naphthalene-disulphonic acid or a reaction product thereof with acetic anhydride or with keten.
As suitable naphthalene disulphonic acids there are for example naphthalene-1:5-disulphonic acid, naphthalene-2:S-disulphonic acid and naphthalene-2:7-disulphonic acid.
The reaction products of these naphthalenedisulphonic acids which may also be used are of uncertain constitution but it is believed that they are mixed anhydrides. It is believed also, although this hypothesis is advanced only by Way of explanation, that when the naphthalene-disulphonic acid is used as such it is first converted into the said reaction product by reaction with keten.
The invention is illustrated but not limited by the following examples.
Example 1 A gas obtained by pyrolysis of acetone and containing about 30 mols. per cent of keten and substantially free from acetone is bubbled at a rate of 1.5 gram mols. of keten per hour through a solution of 5 grams of naphthalene-1:5-disulphonic acid in 1200 grams of acetone in a reaction vessel in a bath maintained at 75 to- 85 C. Acetone is condensed from the oif-gases at 60 to 70 C. and returned to the reaction vessel. After 14 hours the contents of the reaction vessel are fractionally distilled and 1442 grams of isopropenyl acetate are obtained. This represents a yield of 92.7% calculated on the acetone consumed and of 90.0% calculated on the keten absorbed. The conversion of acetone is 75.2%.
8 Claims.
2 Example 2 170 grams of naphthalene-1:5-disulphonic acid (containing 20% Water) is boiled under reflux with 320 grams of acetic anhydride during 4 hours in a bath maintained at C. The mixture is then distilled to 40 C. at a pressure of 10 mms. The residue is used as catalyst in the following process in which the details are those of Example 1. Keten is passed at a rate of 1.5 gram mols. per hour through a mixture of 5 grams of the catalyst and 1250 grams of acetone for 13.5 hours. Distillation of the reaction mixture affords 1552 grams of isopropenyl acetate which represents a yield of 93.6% calculated on the acetone consumed and of 91.3% calculated on the keten absorbed. lhe conversion of acetone is 76.9%.
Example 3 Keten is passed at a rate of 1.5 gram mols. per hour through a mixture of 4 grams of naphthalene-2:6-disulphonic acid and 1300 grams of acetone for 6.5 hours as described in Example 1. Distillation of the reaction mixture affords 664 grams of isopropenyl acetate which represents a yield of 94.2% calculated on the acetone consumed and of 90.7% calculated on the keten absorbed. The conversion of acetone is 31.7%.
Under otherwise identical conditions but using 4 grams of sulphuric acid in the place of 4 grams of naphthalene-2:G-disulphonic acid, 316 grams of isopropenyl acetate are obtained which represent a yield of 80.4% calculated on the acetone consumed and of 7.i% calculated on the kcten absorbed. The conversion of acetone is 17.6%.
Under otherwise identical conditions, but using 41-. grams of p-toluenesulphonic acid in the place of 4 grams of naphthalene-2:G-disulphonic acid, grams of isopropenyl acetate are obtained which represent a yield of 56.7% calculated on the acetone consumed and of 48.1% calculated on the keten absorbed. The conversion of acetone is 12.3%.
Example 4 grams of naphthalene-2zo-disulphonic acid (water content 20%) and 350 grams of acetic anhydride are boiled together under reflux during 4 hours in a bath maintained at 140 C. The mixture is then distilled to 40 C. at 10 mms. pressure and the residue is used as catalyst in the following process in which the details of operation are those of Example 1. Keten is passed at a rate of 1.5 gram mols. per hour through a mixture of 5 grams of the catalyst and 1300 grams of acetone for 6.5 hours. By distillation of the reaction product, 589 grams of isopropenyl 3 acetate are obtained which represents a yield of 97.1% calculated on the acetone consumed and of 95.2% calculated on the keten absorbed. The conversion of acetone is 27.2%.
Example 5 Keten is passed at a rate of 1.5 gram mols. per hour through a mixture of 4 grams of naphthalene-2:7-disulphonic acid and 1300 grams of acetone for 5.5 hours as described in Example 1. Distillation of the reaction product afiords 565 grams of isopropenyl acetate which represents a yield of 94.9% calculated on the acetone consumed and of 92.8% calculated on the keten absorbed. The conversion of acetone is 26.4.
Under otherwise identical conditions but using 4 grams of m-nitrobenzenesulphonic acid in place of the 4 grams of naphthalene-2:7-disulphonic acid, 206 grams of isopropenyl acetate are obtained. This represents a yield of 65.2% calculated on the acetone consumed and of 57.2% on the keten absorbed. The conversion of acetone is 14.2%.
What I claim is:
1. In the production of isopropenyl acetate by reacting keten with acetone in the presence of a catalyst, the improvement which comprises utilizing, as the catalyst, a compound selected from the group consisting of naphthalene disulfonic acids and reaction products thereof with a member of the group consisting of acetic anhydride and keten.
2. The improved process of claim 1, wherein said catalyst is naphthalene-1:5-disu1ionic acid.
3. The improved process of claim 1, wherein said catalyst is naphthalene-2:6-disulfonic acid.
4. The improved process of claim 1, wherein said catalyst is naphthalene-2:7-disulionic acid.
5. A catalyst comprising the reaction product of a naphthalene disulfonic acid and a compound selected from the group consisting of acetic anhydride and keten.
6. A catalyst comprising the reaction product of a naphthalene-1:5-disulfonic acid and a compound selected from the group consisting of acetic anhydride and keten.
7. A catalyst comprising the reaction product of a naphthalene-2:G-disulfonic acid and a compound selected from the group consisting of acetic anhydride and keten.
8. A catalyst comprising the reaction product of a naphthalene-2:7-disulfonic acid and a compound selected from the group consisting of acetic anhydride and keten.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,481,669 Hull Sept. 13, 1949 2,511,423 Young June 13, 1950
Claims (1)
1. IN THE PRODUCTION OF ISOPROPENYL ACETATE BY REACTING KETEN WITH ACETONE IN THE PRESENCE OF A CATALYST, THE IMPROVEMENT WHICH COMPRISES UTILIZING, AS THE CATALYST, A COMPOUND SELECTED FROM THE GROUP CONSISTING OF NAPHTHALENE DISULFONIC ACIDS AND REACTION PRODUCTS THEREOF WITH A MEMBER OF THE GROUP CONSISTING OF ACETIC ANHYDRIDE AND KETEN.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2684980X | 1951-05-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2684980A true US2684980A (en) | 1954-07-27 |
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ID=10913414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US290080A Expired - Lifetime US2684980A (en) | 1951-05-29 | 1952-05-26 | Use of naphthalene disulfonic acid as a catalyst in the manufacture of isopropenyl acetate |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2684980A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2898351A (en) * | 1955-10-20 | 1959-08-04 | Organon | Process for the preparation of enol esters |
| US3529014A (en) * | 1968-01-30 | 1970-09-15 | Techni Chem Co The | Process for preparing enol acetates from ketones |
| US4902824A (en) * | 1988-05-09 | 1990-02-20 | Nalco Chemical Company | Dispersant for vinyl acetate unit fouling |
| CN105777540A (en) * | 2016-04-06 | 2016-07-20 | 衢州信步化工科技有限公司 | Energy-saving efficient isopropenyl acetate synthesis method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2481669A (en) * | 1949-09-13 | Process for producing enol acetates | ||
| US2511423A (en) * | 1949-03-19 | 1950-06-13 | Union Carbide & Carbon Corp | Production of enol acetates |
-
1952
- 1952-05-26 US US290080A patent/US2684980A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2481669A (en) * | 1949-09-13 | Process for producing enol acetates | ||
| US2511423A (en) * | 1949-03-19 | 1950-06-13 | Union Carbide & Carbon Corp | Production of enol acetates |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2898351A (en) * | 1955-10-20 | 1959-08-04 | Organon | Process for the preparation of enol esters |
| US3529014A (en) * | 1968-01-30 | 1970-09-15 | Techni Chem Co The | Process for preparing enol acetates from ketones |
| US4902824A (en) * | 1988-05-09 | 1990-02-20 | Nalco Chemical Company | Dispersant for vinyl acetate unit fouling |
| CN105777540A (en) * | 2016-04-06 | 2016-07-20 | 衢州信步化工科技有限公司 | Energy-saving efficient isopropenyl acetate synthesis method |
| CN105777540B (en) * | 2016-04-06 | 2019-07-23 | 衢州伟荣药化有限公司 | A kind of methylvinyl acetate synthetic method |
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